Secondary IGN waveforms

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Secondary IGN waveforms

Postby spit64 » Fri Jul 08, 2016 4:52 am

I need help to understand secondary waveform on a Audi 100 1988 ignition with a distributor and Bosch mono jettronic fuel injection,Throttle body injection.
Fixed a problem with rich condition and car runs great now passed inspection CO 0,8. But I don't like the secondary ignition waveforms no experience with scope but I now how a good secondary waveform looks like.
I used the MI074 Secondary Ignition Pickup.
Cyl1
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Audi_100_1998_20160704-0001 sec ign.psdata
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Re: Secondary IGN waveforms

Postby spit64 » Fri Jul 08, 2016 9:55 am

Cyl 2. I understand that the waveform is showing both rich and lean but is it interference from other cylinders in the waveform or is it only the probed spark plug wire that I have on the waveform.
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Audi_100_1998_20160704-0001 sec ign 2.psdata
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Re: Secondary IGN waveforms

Postby Fat Freddy » Fri Jul 08, 2016 10:47 am

Plugs replaced?

HTH
FF
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Re: Secondary IGN waveforms

Postby spit64 » Fri Jul 08, 2016 11:06 am

Yes plugs replaced my thinking is if all the captured trace is from the probed wire or is it noise from some other spark plugs wire. upload a capture from king lead.
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Audi_100_1998_20160612-ign king lead.psdata
King lead
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Re: Secondary IGN waveforms

Postby AuthorMike » Fri Jul 08, 2016 11:43 am

(apologies for the delay on approving a couple of posts here)
Mike Valentine
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